OpenClaw versions prior to 2026.2.19 construct RegExp objects directly from unescaped Feishu mention metadata in the stripBotMention function, allowing regex injection and denial of service. Attackers can craft nested-quantifier patterns or metacharacters in mention metadata to trigger catastrophic backtracking, block message processing, or remove unintended content before model processing.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Openclaw Openclaw
cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
|
— |
2026.2.19
|
References 4
https://github.com/openclaw/openclaw/commit/74268489137510b6f6349919d1e197b1729…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/7e67ab75cc2f0e93569d12fecd1411c2961…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-c6hr-w26q-c636
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-redos-and-regex-injection-via-une…
disclosure@vulncheck.com